Cement-kiln.



J; sf WENTZ.

CEMENT MLN. APPLICATION FILED JAN. 7,1-907.

1m: Nokms PETERS co.. WASHINGTON, D. c.

TINTTE STATES PATENT FFIQE.

CEllllENTeKlLN.

Specification of Letters Patent.

Patented April 9, i907.

Application filed January 7,1907. Serial No. 351,131.

.To all whom t may con/cern:

Be it known that I, JOHN S. WENTZ, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Cement-Kilns, of which the following is a specification.

The object of my invention is to provide a reciprocating kiln for burning cement, whereby the material is caused to pass through the kiln by a series of intermittent movements. This object I attain in the following manner, reference being had to the accompanying drawings, in which` Figure l is a longitudinal sectional view of my improved kiln for burning cement. Fig. 2 is a sectional view on the line 2 2, Fig. l. Fig. 3 is a view of a detail of the invention, and Fig. 4l is a view of a modification.

A is the body of the kiln.

B is the rear hood or combustion-chamber.

D is the front hood, mounted on wheels d d in the present instance, adapted to tracks on a suitable foundation.

d is a burner, which may be of any suitable type for feeding either powdered coal, oil, or other fuel into the kiln.

In the present instance the kiln A has a flat hearth a and an arched roof a', as clearly illustrated in Fig. 2. of sheet metal having a bed of fire-brick c, forming the hearth proper, and the roof is lined with hre-brick c.

In order to properly support the kiln A, I mount transverse bars c at intervals under the kiln, and these bars have extensions c, to which are pivoted suspension-rodsf, hung from adjustable eyebolts j", provided with nuts f2, as clearly illustrated in Fig. 3. These eyebolts pass through transverse beams F, supported, in the present instance, on posts E, of concrete or other material. The transverse beams are suitably braced by longitudinal beams F or tiebars, as desired. By adjusting the nuts f2 on the bolts j the proper inclination can be given to the kiln A to feed the material gradually forward on the reciprocation of the kiln.

G is a conveyer for feeding material into the kiln, and g is an inclined trough extending into the feed end of the kiln to deliver material from the conveyer to the kiln. The material is discharged through a passage'd2 in the front hood D, and this passage communicates with the pit-passage h in the ordinary manner.

Different forms of mechanism may be used The kiln-body is made for imparting a reciprocating motion to the kiln, and in' the present instance I have shown in Fig. l a shaft I, mounted in suitable bearings on the foundation and having a cam i, with which engages a roller on an arm t', carried by a rock-shaft I, and on this rock-shaft is another arm t2, connected by a rod is to a bracket a2, depending from the bottom of the kiln. lhe cams can be cut in any manner desired to give more or less movement to the kiln but they are preferably cut to give a comparatively quick movement in one direction, so that the material will be fed intermittently from the inlet end of the kiln to the discharge end, the amount of movement depending entirely upon the amount of throw of the cam and the inclination of the floor of the kiln.

In operation the kiln is reciprocated by the mechanism described, and the material is fed in given quantities through the spiral conveyer down the inclined trough into the feed end of the kiln, dropping upon the hearth or floor. The kmaterial is fed forward intermittently while the products of combustion play upon it from the discharge end of the kiln, escaping at the inlet end to the stack B. The material is finally discharged through the passage d2 in the front hood D into the clinker-pit. The material will be agitated sufficiently to allow the flame to attack it and to properly reduce it, hrst driving off the carbonic-acid gas and finally clinkering it.

By making the kiln in the manner shown I can increase its capacity by providing a wide hearth, as clearly shown in Fig. 2, and can bring the roof close to the hearth by making a very shallow arch. 'Ihus the flame is directed throughout its entire course through the kiln in close proximity to the material.

While I-have shown the structural beams F F mounted on piers of concrete E, they may be carried by the framework of the building in which the cement kiln is situated, if desired.

Fig. 4 illustrates a modification in which the front hood D is made part of the kilnbody A. An opening d3 in the lower portion of the hood allows for the free escape of the clinker when it reaches the discharge end of the kiln, and while I have shown the kiln suspended in Fig. 1 it may be mounted on rollers, as shown in Fig. 4, and reciprocated by any suitable mechanism. In this instance IOC) IIO

the rails fm are mounted upon adjustable I a kiln consisting ot an elongated llat hearth bearings m, or the box for the wheels ai may be made vertically adjustable lor the samo purpose, il desired. l have shown in this instance eccentrics l2 on the transverse operating-shaft l in place of the cam shown in Fig. l, and the eccentric-rods it are connected to brackets on each side of the kiln.

I claim- 1. The combination of a cement-kiln having a hearth, a roof inclosing the hearth, means 'for reciprocating the hearth, means for feeding material onto the hearth at one end of the kiln, and means for discharging it at the opposite end of the kiln, means lor `feeding fuel into the discharge end of the kiln between the hearth and the roof, and. a ilue at the inlet end of the kiln communicating with the kiln so that the products of combustion will pass tlirough the kiln between the roof and the hearth and in contact with the ma terial, substantially as described.

2. The combination of a kiln having an elongated body portion, a hearth, a rootl .inclosing the hearth, means for reciprocating both the hearth and the roof, means 'for feeding material onto the hearth at one end of the kiln., an outlet for the discharge of material at the opposite end oit the kiln, a stack at the feed end of the kiln connnunicating with the space between the hearth and the roof, and means for admitting fuel into the kiln above the hearth, substantially as described.

3. The combination of a kiln having an elongated body portion, a Hat hearth, and an arched roof inclosing the hearth, a series of suspension-rods coupled to the body of the kiln, means for vertically adjusting the suspension-rods, means lor reciprocating the entire body portion including the hearth and the roof, means for leeding material onto the hearth, an outlet for the discharge of material from the hearth, means lor feeding fuel into the discharge end of the kiln between the hearth and the roof, and a stack communicating with the opposite end of the kiln so that the products of combustion will pass through the kiln in contact with the material, substantially as described.

4. The combination of the body portion of and an arched roof covering said hearth, a rear hood into which the body of the kiln extends, a stack communieating with said hood, means `for feeding material into this` end of the kiln, a iront hood having a di charge-opening, and means Vtor reciproca ting the body portion of the kiln, substantially :is described.

5. The combination in a kiln, ot an elongated body portion having a [lat hearth and an arched roof, a series of suspensioirro if: coupled to the body portion ol" the means for vertically adj nsting the suspensionrods, and. means lor ree'pro lating the bod;Y portion, substantially as described.

The conibination in a kiln, ol an elo-ngated body portion having a llat hearth and an arched roel", a 'fixed rear hoed, a rhiinneiv connected to said hood, a Vfront hood, n burner projecting through said trent hood` means for reciprocating the body portion in both the front hood and the rear hood, rarriers 'for the body portion, and means in vertically adjusting the carriers, sunstantially as described.

7. The combination in a kiln Vlor burning coment, having an elongated body poi-lion provided with a llat hearth and an ari-hed roei inclosing the hearth, lateral Iiroiee iin` on said body portion, suspension-rods 'innected to said proiections, vertically-ailinalable eyebolts to which the said rods are von nected, a cam, means 'for driving said mini, a rock-shalt actuated by ther earn and ronnected to the body portion ol" the kiln. n iront hood and a rear hood, means for leeding material onto the hearth el: the n -1 rlischarge-epening for the escape of niaiei'ia, means tor 'feeding fuel into the space between the hearth and the roei ol. the kiln., and o stack communicating with the opposite end of the kiln, substantially as described.

ln testimony whereof l have signed my name to this spec'lication in the prescrire ol two subscribing witnesses.

Wi tnesses z J os. H. KLEIN, WM. Ar. Bann. 

